Sequential Paresis

Sequential Paresis

Sequential, or "round the clock", paresis or weakness refers to the sequential development of weakness in one arm, the ipsilateral leg, the contralateral leg, and contralateral arm (i.e., hemiparesis, triparesis, tetraor quadriparesis). This pattern is highly suggestive of a foramen magnum lesion, usually a tumor but sometimes demyelination or other intrinsic inflammatory disorder, sequentially affecting the lamination of corticospinal fibers in the medullary pyramids.

Cross References

Hemiparesis; Paresis; Quadriparesis, Quadriplegia